Your paragraph mostly makes sense, but there are some grammatical errors that can be fixed easily! For example, word choice. The word "familiarity" doesn't really work well in the first sentence sentence. Instead, you can use a "synonym" (meaning a different word that has the same meaning as another word) that would fit in more better).
for example, "Are you familiar with classical music?" would have made more sense for the first sentence.
In the second sentence, you have to remember to never start a sentence with a conjunction word (for example: so, and, but, yet). That way, your sentences will make a lot more sense, and will sound very normal!
Everything else sounds good!
よくやったね!!

Here's my correction:
"Are you starting to feel familiar with classical music? There are many eccentric composers. I recommend that you research about them and their music. If you ever feel like listening to classical music, try going to an orchestra concert; it only costs about 2,000 yen to get in. Besides, you can come and listen to my orchestra club's concert for free. It is going to be held on December 23rd. Why don't you try listening to our classical music?"